diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testAddInconvertibleObjectAny.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testAddInconvertibleObjectAny.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,34 @@
+function testAddInconvertibleObjectAny()
+{
+  var count = 0;
+  function toString()
+  {
+    ++count;
+    if (count == 95)
+      return {};
+    return "" + count;
+  }
+  var o = {valueOf: undefined, toString: toString};
+
+  var threw = false;
+  try
+  {
+    for (var i = 0; i < 100; i++)
+        var q = o + 5;
+  }
+  catch (e)
+  {
+    threw = true;
+    if (i !== 94)
+      return "expected i === 94, got " + i;
+    if (q !== "945")
+      return "expected q === '945', got " + q + " (type " + typeof q + ")";
+    if (count !== 95)
+      return "expected count === 95, got " + count;
+  }
+  if (!threw)
+    return "expected throw with o + 5";
+
+  return "pass";
+}
+assertEq(testAddInconvertibleObjectAny(), "pass");